black frequency 中文意思是什麼

black frequency 解釋
黑信號頻率
  • black : n 布萊克〈姓氏〉。adj 1 黑，黑色的。2 暗的；黑暗的。3 （教士等）穿黑衣的。4 污染的，（手等）弄臟...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. In this study, the stem segments of new shoot with axillary buds of well - growth tetraploid black locust trees were used as explants. the effects of different basic mediums, different hormone kinds and their concentrations ratios, different sucrose concentrations on calli induction, buds differentiation and rooting in the process of establishment of high frequency regeneration system of tetraploid black locust were studied. on the base of high frequency regeneration system, the effects of various factors on transformation efficiency of badh mediated by agrobacterium tumefaciens were discussed in the light of gus histochemical assays

    本實驗首先以生長良好的四倍體刺槐優株上當年生新梢的帶腋芽莖段為外植體，研究了在四倍體刺槐高頻再生體系的建立過程中不同基本培養基、不同激素濃度及其配比、不同蔗糖濃度對愈傷組織的誘導、芽的分化及生根的影響；然後在得到高頻再生體系的基礎上，通過農桿菌介導法轉化甜菜堿醛脫氫酶（ badh ）基因，以gus染色組織分析為依據探討了影響轉化效率的各種因素，建立了高效、可重復的基因轉化體系，為四倍體刺槐目的基因的導入打下了基礎。
  2. The frequency and seerity of symptoms declined by about 30 percent oer 12 months regardless of whether women were taking black cohosh or placebo

    的婦女在超過12個月之後頻繁和嚴重的癥狀都會減少，無論是否使用黑升麻或安慰劑。
  3. The six sigma black belt should be able to read values from a cumulative frequency ogive

    6西格瑪黑帶應能從累計頻次尖頂部讀出數值。
  4. Using the advanced technology by its head office ( newkey co., ltd. ), it produces various kinds of alumina black and white ceramic products. the component alumina ceramics, which are widely used in electron components, devices, electrical products, enjoy low loss of high frequency, high insulating strength, good specific volume resistance, small dielectric constant, high mechanical intensity and excellent airtightness and thermal and chemical stability

    本公司根據目前市場需求，生產出各種型號的黑、白陶瓷產品，廣泛應用於電子、電工、化學工業、紡織工業、水暖、宇航、環保等諸多方面，系列產品有高頻損耗少，比體積電阻大，介電常數小，強度高，氣密性、熱穩定性、化學穩定性好等特點。
  5. Given a table of raw data, the six sigma black belt should be able to prepare a frequency tally sheet of the data, and to use the tally sheet data to construct a histogram

    給出一份原始數據表， 6西格瑪黑帶應能作出一份數據頻次表，並且能使用這頻次表構建一份直方圖。
  6. The identification and improvement of black - spot, as an important task of traffic safety management, are very effect measures to reduce the traffic accident frequency

    作為交通安全管理工作的重要任務，交通事故黑點的鑒別與改善是預防交通事故發生、減少交通事故損失的有效手段。
  7. The six sigma black belt should be able to compute the mean and standard deviation from a grouped frequency distribution

    6西格瑪黑帶應能從一組頻次分佈數據計算出均值和標準偏差。
  8. 5. a multivariable process identification based on asymptotic black - box theory is studied. firstly, a high - order mimo arx model and its frequency error bound is estimated from identification data and low - order siso models is obtained from high - order mimo arx model

    作者對一種基於漸近黑箱理論的多變量過程辨識方法進行了研究：首先用高階arx模型估計模型參數，並給出高階模型的頻域均方誤差；然後，對高階arx模型進行降階處理。
  9. Abstract : the paper presents the study on problems of self - excitation ， over - voltage ， frequency and voltage stability ， organizational measures and arrangement in the course of black start and restoration of the system. through simulation of black start on east china power system ， above problems are analyzed and solved ， it shows that working out strict black start scheme may not only speed up system restoration ， reduce outage losses ， but also have important significance to emergency release or power system islanding

    文摘:研究電力系統黑啟動的過程及恢復中存在的自勵磁、過電壓、頻率和電壓穩定、組織措施及安排等問題，並通過華東系統黑啟動模擬對上述問題進行分析和解決，證明制定嚴格的黑啟動計劃不僅可以迅速恢復系統、降低事故損失，而且對處理緊急狀態或地區性解裂有重要意義。
  10. Various solutions such as raising response speed of lcd pixels, raising frame frequency, back light blinking, back light scanning, black field insertion and image processing were reviewed

    討論了提高液晶像素的響應速度、提高幀頻、背光源閃爍、背光源掃描、插入黑場和採用圖像處理技術等多種解決方法，並對各種方法進行了分析和評論。
  11. After analyzing the part and feature of the ancillary service, we discuss the component and making price method of that, the active / frequency control, the reactive / voltage control, the reserve capacity of generator and the restoration / black start mode

    仔細分析了電力市場輔助服務的構成和特點，分別詳細討論了有功頻率控制、無功及電壓控制、發電備用容量、恢復及黑啟動等輔助服務的構成方式、定價方案。
  12. First start sensor a first start sensor is an electronic device within some paralleling equipment that senses generator set and bus voltage and frequency, and determines whether or not a generator set is the first unit ready to close to the bus following a call to start under " black start " conditions

    首啟動傳感器首啟動傳感器是應用於某些並聯設備中的電子裝置，功能是感知發電機組和母排的電壓、頻率，判斷哪個機組在接到「黑啟動」信號后第一個可以合到母排。
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